include/linux/serial_sci.h

   1 #ifndef __LINUX_SERIAL_SCI_H
   2 #define __LINUX_SERIAL_SCI_H
   3
   4 #include <linux/serial_core.h>
   5 #include <linux/sh_dma.h>
   6
   7 /*
   8  * Generic header for SuperH (H)SCI(F) (used by sh/sh64 and related parts)
   9  */
  10
  11 #define SCIx_NOT_SUPPORTED      (-1)
  12
  13 /* SCSMR (Serial Mode Register) */
  14 #define SCSMR_CHR       (1 << 6)        /* 7-bit Character Length */
  15 #define SCSMR_PE        (1 << 5)        /* Parity Enable */
  16 #define SCSMR_ODD       (1 << 4)        /* Odd Parity */
  17 #define SCSMR_STOP      (1 << 3)        /* Stop Bit Length */
  18 #define SCSMR_CKS       0x0003          /* Clock Select */
  19
  20 /* Serial Control Register (@ = not supported by all parts) */
  21 #define SCSCR_TIE       (1 << 7)        /* Transmit Interrupt Enable */
  22 #define SCSCR_RIE       (1 << 6)        /* Receive Interrupt Enable */
  23 #define SCSCR_TE        (1 << 5)        /* Transmit Enable */
  24 #define SCSCR_RE        (1 << 4)        /* Receive Enable */
  25 #define SCSCR_REIE      (1 << 3)        /* Receive Error Interrupt Enable @ */
  26 #define SCSCR_TOIE      (1 << 2)        /* Timeout Interrupt Enable @ */
  27 #define SCSCR_CKE1      (1 << 1)        /* Clock Enable 1 */
  28 #define SCSCR_CKE0      (1 << 0)        /* Clock Enable 0 */
  29 /* SCIFA/SCIFB only */
  30 #define SCSCR_TDRQE     (1 << 15)       /* Tx Data Transfer Request Enable */
  31 #define SCSCR_RDRQE     (1 << 14)       /* Rx Data Transfer Request Enable */
  32
  33 /* SCxSR (Serial Status Register) on SCI */
  34 #define SCI_TDRE  0x80                  /* Transmit Data Register Empty */
  35 #define SCI_RDRF  0x40                  /* Receive Data Register Full */
  36 #define SCI_ORER  0x20                  /* Overrun Error */
  37 #define SCI_FER   0x10                  /* Framing Error */
  38 #define SCI_PER   0x08                  /* Parity Error */
  39 #define SCI_TEND  0x04                  /* Transmit End */
  40
  41 #define SCI_DEFAULT_ERROR_MASK (SCI_PER | SCI_FER)
  42
  43 /* SCxSR (Serial Status Register) on SCIF, HSCIF */
  44 #define SCIF_ER    0x0080               /* Receive Error */
  45 #define SCIF_TEND  0x0040               /* Transmission End */
  46 #define SCIF_TDFE  0x0020               /* Transmit FIFO Data Empty */
  47 #define SCIF_BRK   0x0010               /* Break Detect */
  48 #define SCIF_FER   0x0008               /* Framing Error */
  49 #define SCIF_PER   0x0004               /* Parity Error */
  50 #define SCIF_RDF   0x0002               /* Receive FIFO Data Full */
  51 #define SCIF_DR    0x0001               /* Receive Data Ready */
  52
  53 #define SCIF_DEFAULT_ERROR_MASK (SCIF_PER | SCIF_FER | SCIF_ER | SCIF_BRK)
  54
  55 /* SCFCR (FIFO Control Register) */
  56 #define SCFCR_LOOP      (1 << 0)        /* Loopback Test */
  57
  58 /* SCSPTR (Serial Port Register), optional */
  59 #define SCSPTR_RTSIO    (1 << 7)        /* Serial Port RTS Pin Input/Output */
  60 #define SCSPTR_CTSIO    (1 << 5)        /* Serial Port CTS Pin Input/Output */
  61 #define SCSPTR_SPB2IO   (1 << 1)        /* Serial Port Break Input/Output */
  62 #define SCSPTR_SPB2DT   (1 << 0)        /* Serial Port Break Data */
  63
  64 /* HSSRR HSCIF */
  65 #define HSCIF_SRE       0x8000          /* Sampling Rate Register Enable */
  66
  67 enum {
  68         SCIx_PROBE_REGTYPE,
  69
  70         SCIx_SCI_REGTYPE,
  71         SCIx_IRDA_REGTYPE,
  72         SCIx_SCIFA_REGTYPE,
  73         SCIx_SCIFB_REGTYPE,
  74         SCIx_SH2_SCIF_FIFODATA_REGTYPE,
  75         SCIx_SH3_SCIF_REGTYPE,
  76         SCIx_SH4_SCIF_REGTYPE,
  77         SCIx_SH4_SCIF_NO_SCSPTR_REGTYPE,
  78         SCIx_SH4_SCIF_FIFODATA_REGTYPE,
  79         SCIx_SH7705_SCIF_REGTYPE,
  80         SCIx_HSCIF_REGTYPE,
  81
  82         SCIx_NR_REGTYPES,
  83 };
  84
  85 /*
  86  * SCI register subset common for all port types.
  87  * Not all registers will exist on all parts.
  88  */
  89 enum {
  90         SCSMR,                          /* Serial Mode Register */
  91         SCBRR,                          /* Bit Rate Register */
  92         SCSCR,                          /* Serial Control Register */
  93         SCxSR,                          /* Serial Status Register */
  94         SCFCR,                          /* FIFO Control Register */
  95         SCFDR,                          /* FIFO Data Count Register */
  96         SCxTDR,                         /* Transmit (FIFO) Data Register */
  97         SCxRDR,                         /* Receive (FIFO) Data Register */
  98         SCLSR,                          /* Line Status Register */
  99         SCTFDR,                         /* Transmit FIFO Data Count Register */
 100         SCRFDR,                         /* Receive FIFO Data Count Register */
 101         SCSPTR,                         /* Serial Port Register */
 102         HSSRR,                          /* Sampling Rate Register */
 103
 104         SCIx_NR_REGS,
 105 };
 106
 107 struct device;
 108
 109 struct plat_sci_port_ops {
 110         void (*init_pins)(struct uart_port *, unsigned int cflag);
 111 };
 112
 113 /*
 114  * Port-specific capabilities
 115  */
 116 #define SCIx_HAVE_RTSCTS        (1 << 0)
 117
 118 /*
 119  * Platform device specific platform_data struct
 120  */
 121 struct plat_sci_port {
 122         unsigned int    type;                   /* SCI / SCIF / IRDA / HSCIF */
 123         upf_t           flags;                  /* UPF_* flags */
 124         unsigned long   capabilities;           /* Port features/capabilities */
 125
 126         unsigned int    sampling_rate;
 127         unsigned int    scscr;                  /* SCSCR initialization */
 128
 129         /*
 130          * Platform overrides if necessary, defaults otherwise.
 131          */
 132         int             port_reg;
 133         unsigned char   regshift;
 134         unsigned char   regtype;
 135
 136         struct plat_sci_port_ops        *ops;
 137
 138         unsigned int    dma_slave_tx;
 139         unsigned int    dma_slave_rx;
 140 };
 141
 142 #endif /* __LINUX_SERIAL_SCI_H */